Welcome to www.howtocisco.com,
an online resource to assist
people who are preparing to be or already are network
engineers. This website provides a place to learn and
share real Cisco troubleshooting network problems. It
contains many valuable articles, cases, tools and
examples of how to configure Cisco PIX/ASA,
Router, Switch, VLAN, VPN and Wireless.

We have a collection of explanations and suggestions on
how to resolve Cisco issues and will continue to add
more.

For those network engineers who would like to share
their insights, concerns and solutions, they can visit this forum. Besides Cisco, this network forum is also a place
to discuss the issues of Windows OS, computer network,
Internet access, remote access and wireless.

Wireless client can't get IP address from DHCP As I understand from the
case description you a have 1242AG AP configured with three SSIDs on three
different VLANs, but only wireless clients connecting to the SSID on VLAN
300 are not getting an IP address from the DHCP server.

A client tries to modify an access rule and he wants to change outside to a
public IP address in the access rule source.

Allow all VLANs access DMZ in
Cisco ASA A client have multiple VLANs in tier network. They setup rule
on Cisco ASA to allow LAN 1 to access the DMZ only. Now, they want to allow
all VLANs to be able to access the DMZ.

VPN users can't access OWA or Outlook: The client was
working on the Failover Exchange and added CAS servers to a new
VLAN. After that, VPN users have a problem to access OWA or
Outlook. Internet user opens OWA no problem.

Cisco Switch: Unexpected BPDU
received. Port has been Disabled: “This
feature was first implemented to handle special collision
situations in which the switch detected excessive or late
collisions on a port. Excessive collisions occur when a frame is
dropped because the switch encounters 16 collisions in a row”.

NAP with Cisco Routers: I have some users, which are connected to my
network via VPN. VPN terminated on Cisco router. Users use PPTP VPN to
connect to the office network. I want to use NAP for this clients. Does any
one tried this?

How to configure channel in Cisco AP:
Q: All our Cisco 1200 AP are setup to use lease congested Frequency.
However, our security want to use clear channel 1 to 6. How do you configure
Cisco AP to use channel 9?

How to configure channel in Cisco AP:
Q: All our Cisco 1200 AP are setup to use lease congested Frequency. However,
our security want to use clear channel 1 to 6. How do you configure Cisco AP to
use channel 9?

Configure Cisco Switch for Dell NIC Teaming: We created NIC Teaming in Dell
PowerEdge R710 server. The two NICs are connecting to the Cisco switch 3560G
without any issues. If we unplug one cable, the server still works and connects
to the network. Do we need to configure EtherChannel on those two ports.

Cisco: Wireless client can't receive the IP: Situation: The
client tries to setup Cisco wireless 1310 bridge. The client can receive the
signal but can't logon the domain. Ipconfig shows the client can't receive IP
from the DHCP server and the IP is 169.254.x.x.